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Finding the Fourth Proportional to 317,331.60, 475,997.40 and 139,747.20

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Solution

The fourth proportional to 317,331.60, 475,997.40 and 139,747.20 is: 209,620.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,331.60 : 475,997.40 = 139,747.20 : x
  2. Step 2: Convert to fraction form
    317,331.60/475,997.40 = 139,747.20/x
  3. Step 3: Cross multiply
    317,331.60x = 475,997.40 × 139,747.20
  4. Step 4: Simplify right side
    317,331.60x = 66,519,303,857.28
  5. Step 5: Solve for x
    x = 66,519,303,857.28/317,331.60
  6. Step 6: Final answer
    x = 209,620.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.